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Upgrade bundled Expat to 2.9.0 (e.g. for fixes to two vulnerabilities) #158876

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Upgrade bundled Expat to 2.9.0 (e.g. for fixes to two vulnerabilities)#158876
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StanFromIreland
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3.11only security fixes3.12only security fixes3.13only security fixes3.14bugs and security fixes3.15bugs and security fixes3.16new features, bugs and security fixesextension-modulesC modules in the Modules dirtopic-XMLtype-securityA security issue

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@hartwork
hartwork
opened on Oct 5, 2026

Please see blog post https://blog.hartwork.org/posts/expat-2-9-0-released/ for an overview and the change log at https://github.com/libexpat/libexpat/blob/R_2_9_0/expat/Changes for details. Affects all alive branches of Python. Thank you!

Related: #157953 (predecessor for Expat 2.8.5)

CC @StanFromIreland

Activity

  1. StanFromIreland
    self-assigned this
    on Oct 5, 2026
  2. StanFromIreland
    added
    3.11only security fixes
    3.12only security fixes
    3.13only security fixes
    3.14bugs and security fixes
    3.15bugs and security fixes
    3.16new features, bugs and security fixes
    topic-XML
    extension-modulesC modules in the Modules dir
    type-securityA security issue
    on Oct 5, 2026
  3. hugovk
    changed the title [-]Please upgrade bundled Expat to 2.9.0 (e.g. for fixes to two vulnerabilities)[/-] [+]Upgrade bundled Expat to 2.9.0 (e.g. for fixes to two vulnerabilities)[/+] on Oct 5, 2026
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3.11only security fixes3.12only security fixes3.13only security fixes3.14bugs and security fixes3.15bugs and security fixes3.16new features, bugs and security fixesextension-modulesC modules in the Modules dirtopic-XMLtype-securityA security issue

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